Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf1b48c1aebcd57…

MALICIOUS

PDF

52.6 KB Created: 2020-07-10 01:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4468b4074609cbd2359737842f929ba SHA-1: f3396d791675ba832b0d2215e7ba93812069f01b SHA-256: edf1b48c1aebcd57508b1ffe9d035c3c12ba200d72c6aa146201da8b4391cfae
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous embedded links, including a redirector link to 'ttraff.cc', which is flagged as malicious. The document body and embedded links suggest a lure for downloading content, likely to distribute further malware. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a spam or SEO poisoning campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wb?keyword=digital%20signal%20processing%20salivahanan%20pdf%20free%20download
    • http://files.connallyband.com/uploads/1/3/1/8/131856381/koguwoxixude.pdf
    • http://files.pacehighchoir.com/uploads/1/3/1/8/131871891/2056809.pdf
    • http://files.ajaint.com/uploads/1/3/0/7/130739362/d18b049afdea.pdf
    • http://files.kafyeblaan.com/uploads/1/3/1/8/131856381/becb5.pdf
    • http://files.gshomesteaders.com/uploads/1/3/0/7/130740492/89a380bf0b596f.pdf
    • http://files.lindyjames-christenson.com/uploads/1/3/1/3/131379612/3953267.pdf
    • http://files.adviser.live/uploads/1/3/0/7/130776826/kunovo_mituzevajo.pdf
    • http://files.hashomerhatzair.ca/uploads/1/3/1/6/131606670/7308467.pdf
    • http://files.sainteugenechapel.org/uploads/1/3/0/9/130969405/e4aa6c4e7e52b37.pdf
    • http://files.ren-ito.com/uploads/1/3/0/7/130775654/19d0aef2063.pdf
    • https://vovuzugola.files.wordpress.com/2020/07/71364835846.pdf
    • https://gupasuva.files.wordpress.com/2020/06/samefiwanalaziwobewejulej.pdf
    • https://panamekeze.files.wordpress.com/2020/06/15855172047.pdf
    • https://mijukuwojaw.files.wordpress.com/2020/06/dametidabaxifiretumise.pdf
    • https://vupujejuwozo.files.wordpress.com/2020/06/kexisemogox.pdf
    • https://besirix808347311.files.wordpress.com/2020/06/vusok.pdf
    • https://lerebovarepu.files.wordpress.com/2020/07/bujufob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63545483179.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e65.bin
a240aa3153d0a7656edee82e8d05eb2886a9f4a49fe799ed9b2031583166b509		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E65 5356 bytes
font_01_sfnt_off00007096.bin
d97e055e11de589539a249dfdf9c15aca1e9caf4700104d1763a3a5d87d8f7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7096 2320 bytes
font_02_sfnt_off00007ae8.bin
437898ffc9cdc185571ebaf221ddbb924cd2bda2c1b2cc0e8e1e0b884593a81b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE8 10180 bytes
font_03_sfnt_off00009dc1.bin
207faf14306426b668b87aba0c9d447b8ba40b67f0f7b18660ffa0d3c8132265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC1 16224 bytes
font_04_sfnt_off0000b349.bin
c8c03e924f7c84d2b05494fab3eaf2127faa47c04cd0ed509d091fbcd07e576e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB349 4496 bytes

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